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Finding the Fourth Proportional to 3,577.80, 5,366.34 and 981.12

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Solution

The fourth proportional to 3,577.80, 5,366.34 and 981.12 is: 1,471.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,577.80 : 5,366.34 = 981.12 : x
  2. Step 2: Convert to fraction form
    3,577.80/5,366.34 = 981.12/x
  3. Step 3: Cross multiply
    3,577.80x = 5,366.34 × 981.12
  4. Step 4: Simplify right side
    3,577.80x = 5,265,023.50
  5. Step 5: Solve for x
    x = 5,265,023.50/3,577.80
  6. Step 6: Final answer
    x = 1,471.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.